ISAF said Pakistani military liaison officers were kept fully informed throughout the operation.

The strike comes amid a row between Afghan and Pakistani officials about ways to curb the cross-border movement of Taliban-linked militants waging an insurgency in Afghanistan.

After complaints from Kabul that it is not doing enough to stop the fighters from crossing over from bases and training camps in Pakistan, Islamabad has proposed fencing and mining parts of the porous frontier.

Afghanistan has strongly rejected the plan, saying Pakistan would do better addressing the roots of extremism such as supporters of militant training camps.